Tree assists you in organizing your information, sketching plans and brainstorming new ideas. Tree allows you to store your ideas and keywords in segments that you can sort, re-arrange and constantly refine. Tree is designed to be a lightweight application that lets you concentrate on your ideas.

Tree view:
In tree view, Tree displays your data in a horizontally expandable tree diagram. This offers you a more intuitive way of working with your outlines. You can easily switch between tree view and a traditional list view while editing your documents.

Examples of usage:
Tree can be used for
- Writing a novel
- Travel planning
- Recording ideas
- Writing legal briefs
- Great for a quick hierarchy for websites
- Taking notes for academic researches and writings
- ...

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Release Notes:

● Fixed an issue with font handling.

● Fixed an issue with redrawing the view header.

● Fixed an issue with redrawing colored text.

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Most Helpful Reviews

5/5

Version 1.7.7

Review by PoorPhD

Tree is to OmniOutliner what is Textmate is to Microsoft Word -
Tree is to OmniOutliner what is Textmate is to Microsoft Word: less features, less bloat. I write heavily cited research documents and always create monster-sized outlines before write a single sentence. The biggest selling point to Tree was the ability to compose outlines in plain text, that is, without formatting. Much of my outlines are text I've pasted in from other sources (websites, reports etc…), with Omnioutliner I'd need first paste the text into a seperate program (Textmate) to strip out the formatting and only then paste it into my OmniOutline document. With Tree's plain text mode no formatting is kept during pasting, leaving me with a simple, clean document.
My only complaint so far is the default file format (.ktree). Do we really need another proprietary format? You have the option to save as an OPML file, but it is not the default option.

Found helpful by 46 out of 47 people

2/5

Version 1.8.4

Review by Quark Gluon Plasma

Not bad, but I regret buying it -
Update: I am using Tree 1.8.4, and any attempt to open an opml file exported from Tree results in the message:
"The document “Test.opml” could not be opened. Tree cannot open files in the “Outline Processor Markup Language document” format."
Other outlining applications open the exported file just fine. Also, you cannot save to opml either:
"You cannot save this document with extension “.opml” at the end of the name. The required extension is “.rtree”.
If I read the description of Tree carefully, it says it exports opml; it does not say that it imports it.
Original review
I wanted a lightweight outliner that could import/export opml, a standard file format for outlines. Unfortunately, Tree only exports opml, which is pretty pointless, like having a one-way door out of a room but no door in. There's cut-and-paste, but then you need a desktop program that does read opml files, which defeats the point. The unique features of the app are useful, but not earth-shattering.

Found helpful by 7 out of 11 people

More Reviews for Current Version

5/5

Version 1.9.6

Review by blittle

The Best Outliner Without Exception -
Failing to outline and discover subtle rules of law in cases is akin to a self inflicted wound to the case and career. I downloaded Tree and outlined some old standard cases only to discover rulings that could have helped me out in past cases. I am not exaggerating which lawyers are known to do --this is the truth. I tried the Omni product -- form over substance. Albert Einstein was a great believer in simplicity --the simpler the better but not too simple. Einstein would pick this product over the others because its simplicity allows an outliner to get at the real substance which is the data and not be distracted by the form. I was surprised when the Editors did not recommend Tree to high school and college students. Come on now, this is the information age let's give our students a fighting chance. I am just hoping no lawyer is reading this because frankly I am not into helping the other side win. Brenda Joyce Little

Found helpful by 5 out of 6 people

5/5

Version 1.9.6

Review by nutella_98

What a greatly unique app! -
I came across tree accidentally. I’ve been looking for a mind mapping (or alike) program and this app’s approach is just phenomenal. I really like it! For some reason, when I use this app for creative ideas, it really does make me have more ideas to jot down.

Found helpful by 2 out of 2 people

5/5

Version 1.9.6

Review by The Reader

Superb outliner -
The “sideways” outlining really makes this stand out. You can accomplish things with this that I haven’t seen in any other outliner. Take a few minutes to learn how it works and why it’s a different. Then see if you don’t want to have it open all the time for every single project that needs organization. Love it!

Found helpful by 1 out of 1 people

5/5

Version 1.9.6

Review by Xavier The Reviewer

Try the trial, you won -
There are lots of outlining tools out there and everybody's mind works differently when addressing a blank page / plan. For me, this software removes the barrier between getting thoughts onto a page and sharing the organization of thoughts with others. Using Tree, I just do it all at once, organizing on the fly. The horizontal layout helps me quite a lot and I've noticed that novel twist on hierarchy also seems to keep my teams / clients engaged.
Try the trial (from the website?) see what you think.
I love being able to move branches and nodes around with keystrokes.